$ git clone -n https://src.fedoraproject.org/rpms/python-google-cloud-iam.git /var/lib/mock/f39-build-1944370-43192/root/chroot_tmpdir/scmroot/python-google-cloud-iam
Cloning into '/var/lib/mock/f39-build-1944370-43192/root/chroot_tmpdir/scmroot/python-google-cloud-iam'...
$ git fetch origin a1f20a4512b08e14137dd006b6b2c92304f934ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-google-cloud-iam
 * [new ref]         a1f20a4512b08e14137dd006b6b2c92304f934ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a1f20a4 Update to 2.12.2